This one comes from u/ZackarOof.

Basically, some wheel hit boxes are actually spheres, this is because the Unreal Engine (specifically the version the brick rigs uses) doesn't have a cylinder hit box, so Fluppi393 had to use spheres instead.

This could be useful when making hover cars.

This one is by u/Litchytsu.

Scalables do increase in price, BUT the material doesn't affect it. They can range from 4-400.

This could be useful for conquest and zombie mode.

This one is also from u/Litchytsu.

If you stack more than 30 canons, you're wasting your time and brick count. Anything more than 30 doesn't increase your strength, it only increases recoil.

Useful for literally anything.

Again, from u/Litchytsu.

This will be a copy and paste because he worded this perfectly.

Stacking all the bricks of a tank is a very inefficient way of armouring it. It is way more efficient to duplicate only bricks that are not exposed to projectiles and not stacking externally visible bricks.

Useful for everything.

u/Litchytsu... again and again.

Compressors don't just work on the V8, they work for all engines for as long as they're DIRECTLY connected.

Useful for cars.

The Reddit post:
https://www.reddit.com/r/BrickRigs/comments/mkbmab/any_rare_building_tips_for_a_guide/